Sunday Bridges - Holborn Viaduct

Opened in 1869, the Holborn Viaduct enabled access between Holborn and the City of London across the Fleet Valley avoiding the steep hills.
Now crossing a major road (the A40) it is in fact a subterranean river. The Fleet was a major river in Roman times. In Anglo-Saxon times the wells along its banks were reputed to have healing qualities.
However as London grew it became more of an open sewer until eventually covered over.
There are still one or two spots where the river can be heard flowing beneath the streets. There is some talk of opening short sections of it for ornamental purposes.

Courtesy of host Louis La Vache visit a few more Sunday Bridges.